计算机网络TCP实验序号原则,计算机网络实验TCP实验.doc

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最新推荐文章于 2022-10-14 22:29:01 发布

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文章标签：计算机网络TCP实验序号原则

本文详细分析了使用Wireshark进行TCP实验的过程，包括客户端的IP地址和TCP端口号，服务器的IP地址和端口，TCP连接的初始化（SYN和SYN+ACK段的序列号和确认号），HTTP POST命令所在的TCP段以及TCP连接的细节。通过深入探究封包内容，展示了网络通信的基本原理和Wireshark工具的使用技巧。

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计算机网络实验TCP实验

计算机网络实验报告三

TCP实验

1. What is the IP address and TCP port number used by the client computer (source)

that is transferring the file to ? To answer this question, it’s

probably easiest to select an HTTP message and explore the details of the TCP

packet used to carry this HTTP message, using the “details of the selected packet

header window” (refer to Figure 2 in the “Getting Started with Wireshark” Lab if

you’re uncertain about the Wireshark windows).

答：client computer (source)：IP address：02 TCP port number：1161

2. What is the IP address of ? On what port number is it sending

and receiving TCP segments for this connection?

答：the IP address of ：IP address：2 port number：80

3. If you have been able to create your own trace, answer the following question:What is the IP address and TCP port number used by your client computer(source) to transfer the file to ?

答：My client computer:

IP address:0

4. What is the sequence number of the TCP SYN segment that is used to initiate theTCP connection between the client computer and ? What is it in the segment that identifies the segment as a SYN segment?

答：sequence number:0 ；syn 被设置为1说明是syn段。

5. What is the sequence number of the SYNACK segment sent by

to the client computer in reply to the SYN? What is the value of the ACKnowledgement field in the SYNACK segment? How did determine that value? What is it in the segment that identifies the segment as a SYNACK segment?

答：The sequence number of the SYNACK segment sent by is:0；

SYNACK segment 中 ACKnowledgement 的值为1；

ACKnowledgement number的值为SYN消息中sequence number加上1所得；

SYN 和Acknowledgement f都置为1说明这是一个SYNACK segment.

6. What is the sequence number of the TCP segment containing the HTTP POST

command? Note that in order to find the POST command, you’ll need to dig into

the packet content field at the bottom of the Wireshark window, looking for a

segment with a “POST” within its DATA field.

答：第四号报文段是包含 HTTP POST 命令的TCP segment.且报文段的序列号为1.

7. Consider the TCP segment containing the HTTP